<mat-form-field>
  <mat-label>{{T.THEMES.SELECT_THEME|translate}}</mat-label>
  <mat-select>
    <mat-option
      *ngFor="let theme of themes; trackBy:trackBy"
      [value]="theme"
    >
      {{theme|translate}}
    </mat-option>
  </mat-select>
</mat-form-field>
